Many Californians will be spending summer traveling to their favorite getaway spot. Some of the most popular tourist destinations are national parks. But we can love them just a little too much. Too many hikers crowd trails, exhaust from automobiles clouds park air, and as Craig Miller reports, we can also have a big impact on one of the most treasured aspects of a park, its sound.

QUEST, an Emmy Award-winning multimedia science series, has a new focus on the science of sustainability.The half-hour magazine style episodes are produced by a collaboration of six public broadcasters around the country and explore a wide variety of sustainability issues related to food, energy, water, climate and biodiversity. The story segments featured in each show are introduced by on-camera host, environmental journalist Simran Sethi. The series also includes half-hour specials that focus on a single topic.
All 2013-2014 television programs can be viewed online in their entirety or as individual segments by clicking on the titles and images listed below. The programs are also broadcast in each of our six PBS partner regions including North Carolina, Ohio, Nebraska, Northern California and the Pacific Northwest. Check local listings for broadcast dates and times.